Comment 1 for bug 1194934

From the engineer debugging the case:

I noted there is one thing interesting and may be useful for your 3.9.3 backporting:

the i915 Call Trace message will appear when the system is:
1. 3.5.0-32(default) + 3.8.6 i915 backport dkms
2. 3.9.3

the i915 Call Trace message won't appear when the system is:
1. 3.5.0-32(default) without 3.8.6 i915 backport dkms
2. 3.10-rc3

only "3.5.0-32(default) + 3.8.6 i915 backport dkms" raised this bug,
so I think the Call Trace message in comment 2 may not directly raise this bug